ConfigImporterFieldPurger::process

public static ConfigImporterFieldPurger::process(array &$context, ConfigImporter $config_importer)

public static function process(array &$context, ConfigImporter $config_importer) {
  if (!isset($context['sandbox']['field'])) {
    static::initializeSandbox($context, $config_importer);
  }

  // Get the list of field storages to purge.
  $field_storages = static::getFieldStoragesToPurge($context['sandbox']['field']['extensions'], $config_importer->getUnprocessedConfiguration('delete'));
  // Get the first field storage to process.
  $field_storage = reset($field_storages);
  if (!isset($context['sandbox']['field']['current_storage_id']) || $context['sandbox']['field']['current_storage_id'] != $field_storage->id()) {
    $context['sandbox']['field']['current_storage_id'] = $field_storage->id();
    // If the storage has not been deleted yet we need to do that. This is the
    // case when the storage deletion is staged.
    if (!$field_storage->isDeleted()) {
      $field_storage->delete();
    }
  }
  field_purge_batch($context['sandbox']['field']['purge_batch_size'], $field_storage->uuid());
  $context['sandbox']['field']['current_progress']++;
  $fields_to_delete_count = count(static::getFieldStoragesToPurge($context['sandbox']['field']['extensions'], $config_importer->getUnprocessedConfiguration('delete')));
  if ($fields_to_delete_count == 0) {
    $context['finished'] = 1;
  }
  else {
    $context['finished'] = $context['sandbox']['field']['current_progress'] / $context['sandbox']['field']['steps_to_delete'];
    $context['message'] = \Drupal::translation()->translate('Purging field @field_label', array('@field_label' => $field_storage->label()));
  }
}